1913 ( MCMXIII) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Tuesday of the Julian calendar, the 1913th year of the Common Era (CE) and Anno Domini (AD) designations, the 913th year of the 2nd millennium, the 13th year of the 20th century, and the 4th year of the 1910s decade. As of the start of 1913, the Gregorian calendar was 13 days ahead of the Julian calendar, which remained in localized use until 1923.
- January 1 – The British Board of Film Censors receives the authority to classify and censor films.
- January 12 (January 25 Old Style) – Bolshevik activist Josef Dzhugashvili first publishes an article under the pseudonym Stalin which he adopts hereafter. At this time he, Adolf Hitler and Josip Broz Tito are simultaneously resident in Vienna. 
- January 13 – Edward Carson founds the (first) Ulster Volunteer Force by unifying several existing loyalist militias to resist home rule for Ireland.
- January 23 – General election in Tasmania.
- January 23 – In the 1913 Ottoman coup d'état, Ismail Enver comes to power.
- January 30 – The British House of Lords rejects an Irish Home Rule Bill
- February 1 – New York City's Grand Central Terminal, having been rebuilt, reopens as the world's largest railroad station.
- February 3 – The 16th Amendment to the United States Constitution is ratified, authorizing the Federal government to impose and collect income taxes.
- February 9 – Mexican Revolution: Beginning of " La Decena Trágica ", the rebellion of some military chiefs against the President Francisco I. Madero.
- February 13 – Thubten Gyatso, the 13th Dalai Lama, declares the independence of Tibet from Qing dynasty China.
- February 18 – Mexican Revolution: President Francisco I. Madero and Vice President José María Pino Suárez are forced to resign. Pedro Lascuráin serves as President for less than an hour before General Victoriano Huerta, leader of the coup, takes office
- February 22 – Mexican Revolution: Assassination of Francisco I. Madero and José María Pino Suárez.
- February 23 – Joseph Stalin is arrested by the Russian secret police, the Okhrana, in Petrograd and exiled to Siberia.
- c. March 1 – British steamship Calvados disappears in the Sea of Marmara with 200 on board. 
- March 3 – The Woman suffrage parade of 1913 takes place in Washington, D.C. led by Inez Milholland on horseback.
- March 4
- Woodrow Wilson is sworn in as the 28th President of the United States.
- The U.S. Department of Commerce and U.S. Department of Labor are established by splitting the duties of the 10-year-old Department of Commerce and Labor. The Census Bureau, U.S. Bureau of Fisheries and U.S. Coast and Geodetic Survey form part of the Department of Commerce.
- March 4 – 6 – First Balkan War: Battle of Bizani: Forces of the Kingdom of Greece capture the forts of Bizani (covering the approaches to Ioannina) from the Ottoman Empire.
- March 7 – The British freighter Alum Chine , carrying 343 tons of dynamite, explodes in Baltimore harbour. 
- March 12 – Australia begins building the new federal capital of Canberra.
- March 13 – Mexican Revolution: Pancho Villa returns to Mexico from his self-imposed exile in the United States.
- March 17 – The Military Aviation Academy (Escuela de Aviación Militar) is founded in Uruguay, to become the Military Air Force (Fuerza Aérea Militar) on 4 December 1952. The Uruguayan Air Force (FAU) would grow from this foundation.
- March 18 – George I of Greece is assassinated after 50 years on the throne. He is succeeded by his son Constantine.
- March 20 – Sung Chiao-jen, a founder of the Chinese nationalist party ( Kuomintang), is wounded in an assassination attempt and dies two days later.
- March 23 – Supporters of Phan Xích Long begin an attempt to revolt against colonial rule in French Indochina.
- March 25 – Great Dayton Flood after four days of rain in the Miami Valley kills over 360 and destroys 20,000 homes, chiefly in Dayton.
- March 26
- Bernhard Kellermann's novel Der Tunnel is published.
- April 5 – The United States Soccer Federation is formed.
- April 8 – The Seventeenth Amendment to the United States Constitution is passed, dictating the direct election of senators.
- April 21 – Cunard ocean liner RMS Aquitania, built by John Brown & Company, is launched on the River Clyde.
- April 24 – The Woolworth Building opens in New York City. Designed by Cass Gilbert, it is the tallest building in the world at this date and for more than a decade after. 
- May 3 – Raja Harishchandra , the first full-length Indian feature film is released, marking the beginning of the Indian film industry.
- May 9 – July 11 – Major industrial strike in the Black Country of England involving 25,000 workers, threatening preparations for World War I in naval and steel industries. The workers demand 23 shillings minimum wage.
- May 14 – New York Governor William Sulzer approves the charter for the Rockefeller Foundation, which begins operations with a $100,000,000 donation from John D. Rockefeller.
- May 24 – Princess Victoria Louise of Prussia marries Prince Ernest Augustus of Hanover in Berlin, ending the decades-long rift between the Houses of Hohenzollern and Hanover and becoming the last great gathering of European sovereigns.
- May 26 ( May 13 O.S.) – Igor Sikorsky becomes the first person to pilot a 4-engine fixed-wing aircraft.
- May 29 – The ballet The Rite of Spring , with music by Igor Stravinsky conducted by Pierre Monteux, choreography by Vaslav Nijinsky and design by Nicholas Roerich, is premiered by Sergei Diaghilev's Ballets Russes at the Théâtre des Champs-Élysées in Paris; its modernism provokes one of the most famous classical music riots in history.  The audience includes Gabriele D'Annunzio, Coco Chanel, Marcel Duchamp, Harry Graf Kessler and Maurice Ravel.
- May 30 – First Balkan War: The Treaty of London is signed, ending the war. Greece is granted those parts of southern Epirus which it does not already control and the independence of Albania is recognised.
- South Africa's first flying school opens in Kimberley to train pilots for the South African Aviation Corps, to become the South African Air Force on 1 February 1920.
- June 1 – The Greek–Serbian Treaty of Alliance is signed, paving the way for the Second Balkan War.
- June 4 – Emily Davison, a British suffragette, runs out in front of the King's horse, Anmer, at The Derby. She is trampled and dies four days later in hospital, never having regained consciousness. 
- June 8 – The Deutsches Stadion in Berlin is dedicated with the release of 10,000 pigeons in front of an audience of 60,000 people. It had been constructed in anticipation of the 1916 Summer Olympics, later to be cancelled the result of World War I.
- June 11
- Women's suffrage is enacted in Norway.
- Battle of Bud Bagsak: Armed with guns and heavy artillery, U.S. and Philippine troops under General John J. "Black Jack" Pershing fight a four-day battle against 500 Moro rebels who are armed mostly with kampilan swords. The rebels are killed in a final desperate charge on June 15.
- June 18 – The Arab Congress of 1913 opens, during which Arab nationalists meet to discuss desired reforms under the Ottoman Empire.
- June 19 – The Parliament of South Africa passes the Natives Land Act, limiting land ownership for blacks to black territories.
- June 13 – The predecessor of the Aldi store chain opens in Essen, Germany.
- June 24 – Joseph Cook becomes the 6th Prime Minister of Australia.
- June 29 – The Second Balkan War begins.
- Foundation of Iglesia ni Cristo, an independent sect of Christianity in the Philippines.
- July 10
- July 27 – Foundation of the town of San Javier, Uruguay,  by Russian settlers.
- August 4 – Republic of China: the province of Chungking (Chongqing) declares independence; Republican forces crush the rebellion in a couple of weeks.
- August 10 – Second Balkan War: The Treaty of Bucharest is signed, ending the war. Macedonia is divided and Northern Epirus is assigned to Albania.
- August 13 – Harry Brearley invents stainless steel in Sheffield.
- August 20 – After his airplane fails at an altitude of 900 feet (270 m), aviator Adolphe Pégoud becomes the first person to bail out to safety from an airplane and land safely.
- August 23 – The statue The Little Mermaid in Copenhagen, Denmark, is finished.
- August 26 – Dublin Lock-out in Ireland: Members of James Larkin's Irish Transport and General Workers' Union employed by the Dublin United Tramways Company begin strike action in defiance of the dismissal of trade union members by its chairman. 
- August 31 – Dublin Lock-out: "Bloody Sunday": The dispute escalates when the Dublin Metropolitan Police kill one demonstrator and injure 400 in dispersing a demonstration. 
- September 7 – 8 – Fourth Congress of the International Psychoanalytical Association in Munich, the last occasion on which Carl Jung and Sigmund Freud will meet.
- September 9
- In Germany, BASF starts the world's first plant for the production of fertilizer based on the Haber-Bosch process, feeding in modern times about a third of the world's population.
- Imperial Russian Army pilot Pyotr Nesterov becomes the first person to loop an airplane, flying a Nieuport IV monoplane over Syretzk Aerodrome near Kiev, Russia.
- Helgoland Island air disaster: The first fatalities aboard a German airship occur when the Imperial German Navy Zeppelin dirigible LZ 14 (naval designation L 1 ) is forced down into the North Sea off Heligoland during a thunderstorm, killing 16 of the 22 men on board.
- September 10 – Jean Sibelius's tone poem Luonnotar is premiered in Gloucester Cathedral, England, with soprano Aino Ackté.
- September 17 – In Chicago, the Anti-Defamation League of B'nai B'rith is founded, with Sigmund Livingston as its first president.
- September 23 – French aviator Roland Garros crosses the Mediterranean in an airplane flying from Fréjus, France to Bizerte, Tunisia.
- September 29 – Second Balkan War: The Treaty of Constantinople is signed in Istanbul between the Ottoman Empire and the Kingdom of Bulgaria.
- October 1 – Mexican Revolution: Pancho Villa's troops take Torreón after a 3-day battle, when government troops retreat.
- October 7 – The Ford Motor Company's Highland Park Plant in Highland Park, Michigan near Detroit becomes the first automobile production facility in the world to implement the moving assembly line, significantly speeding up production of the Model T.
- October 9 – Canadian-owned ocean liner SS Volturno (1906), carrying passengers (mostly immigrants) and a chemical cargo from Rotterdam to New York City, catches fire in a North Atlantic gale. 136 die, but 521 are saved by ships summoned by SOS messages to the scene.
- October 10
- October 11 – The Philadelphia Athletics win the deciding game of the 1913 World Series, over baseball's New York Giants, winning 3–1 to take the series in five games.
- October 14 – Senghenydd colliery disaster: An explosion at the Universal Colliery, Senghenydd in South Wales kills 439 miners, the worst mining accident in the United Kingdom.
- October 16 – The British Royal Navy's HMS Queen Elizabeth is launched at Portsmouth Dockyard as the first oil-fired battleship. 
- October 18 – The Monument to the Battle of the Nations at Leipzig in Germany is finished.
- October 19 – The DLRG (German Life-Saving Society) is founded.
- October 26 – Victoriano Huerta elected president of Mexico.
- October 28 – December 2 – Zabern Affair: Acts of aggression by the Prussian garrison at Zabern in the Imperial Territory of Alsace-Lorraine provoke political debate across the German Empire.
- October 31 – The Lincoln Highway, the first automobile road across the United States, is dedicated.
- November 5 – The King Otto of Bavaria is deposed by his cousin, Prince Regent Ludwig, who assumes the title Ludwig III.
- November 6 – Mohandas Gandhi is arrested while leading a march of Indian miners in South Africa.
- November 7 – 11 – The Great Lakes Storm of 1913 claims 19 ships and more than 250 lives.
- December 1
- The Ford Motor Company introduces the first moving assembly line, reducing chassis assembly time from 12½ hours in October to 2 hours, 40 minutes. Although Ford is not the first to use an assembly line, his successful adoption of one sparks an era of mass production.
- Crete, having obtained self rule from Turkey after the First Balkan War, is annexed by Greece.
- December 12 – Vincenzo Peruggia tries to sell the Mona Lisa in Florence and is arrested.
- December 19 – The Raker Act is signed by President Woodrow Wilson, allowing the City of San Francisco to dam Hetch Hetchy Valley in Yosemite National Park.
- December 23 – The Federal Reserve System is created as the central banking system of the United States by Woodrow Wilson's signature of the Federal Reserve Act.
- December 30 – Italy returns the Mona Lisa to France.
- Establishment of Ahmadiyya Muslim Community in Bengal Province (modern-day Bangladesh).
- French physicist Georges Sagnac shows that light propagates at a speed independent of the speed of its source.
- The Camel cigarette brand is introduced by R. J. Reynolds in the United States, the first packaged cigarette.
- Prada is established as a leather goods dealer in Milan by Mario Prada and his brother.
- The value of world trade reaches roughly $38 billion.
- January 1 – Shek Kin, Hong Kong veteran actor (d. 2009)
- January 2 – Anna Lee, English-American actress (d. 2004)
- January 4 – Malietoa Tanumafili II, Samoan head of state (d. 2007)
- January 6
- January 7 – Victor H. Krulak, United States Marine Corps general (d. 2008)
- January 9
- January 10
- January 11
- January 15
- January 17 – Everett Parker, American civil rights activist (d. 2015)
- January 18 – George Unwin, British fighter ace of WWII (d. 2006)
- January 22
- January 23
- January 25
- January 29
- February 2 – Poul Reichhardt, Danish actor (d. 1985)
- February 4
- February 6 – Mary Leakey, British anthropologist (d. 1996)
- February 8 – Betty Field, American actress (d. 1973)
- February 10
- February 14
- February 19 – Frank Tashlin, American animation director (d. 1972)
- February 20 – Tommy Henrich, American baseball player (d. 2009)
- February 25
- February 26 – George Barker, British poet (d. 1991)
- February 27
- March 1 – R. S. R. Fitter, British writer (d. 2005)
- March 2 – Godfried Bomans, Dutch writer (d. 1971)
- March 4 – John Garfield, American actor (d. 1952)
- March 12 – Loulie Jean Norman, American singer (d. 2005)
- March 13
- March 15 – Rosita Contreras, Argentine actress (d. 1962)
- March 18
- March 19 – Smoky Dawson, Australian singer (d. 2008)
- March 21 – George Abecassis, English race car driver (d. 1991)
- March 26
- March 29 – R. S. Thomas, Welsh poet (d. 2000)
- March 30
- March 31 – Etta Baker, American musician (d. 2006)
- April 3 – Per Borten, Premier of Norway (d. 2005)
- April 4
- April 7
- April 8
- April 10 – Stefan Heym, German writer (d. 2001)
- April 11 – Oleg Cassini, American fashion designer (d. 2006)
- April 11 – Winifred Drinkwater, Scottish aviator and first woman to hold a commercial pilot's license (d. 1996)
- April 14 – Jean Fournet, French conductor (d. 2008)
- April 16 – Les Tremayne, British-born American actor (d. 2003)
- April 18 – Jack Pope, American judge, attorney, and author (d. 2017)
- April 21 – Richard Beeching, Chairman of British Rail (d. 1985)
- April 27 – Philip Hauge Abelson, American physicist, writer, and editor (d. 2004)
- April 29 – Eugene Vielle, British Royal Air Force officer (d. 2015)
- May 1
- May 4 – Hisaya Morishige, Japanese actor (d. 2009)
- May 8
- May 11 – Robert Jungk, Austrian journalist (d. 1994)
- May 13 – William R. Tolbert, Jr., President of Liberia (d. 1980)
- May 16
- May 19 – Neelam Sanjiva Reddy, Indian politician and 6th President of India (d. 1996)
- May 20
- May 22 – Benedict Garmisa, American politician (d. 1985)
- May 24
- May 26
- May 29 – Tony Zale, American boxer (d. 1997)
- May 31 – Peter Frankenfeld, German comedian, radio and television personality (d. 1979)
- June 2 – Elsie Tu, English-born Hong Kong social activist (d. 2015)
- June 6 – Carlo L. Golino, American scholar (d. 1991)
- June 10 – Benjamin Shapira, a German-born Israeli biochemist and recipient of the Israel Prize (d. 1993)
- June 11
- June 13
- June 18
- June 21
- June 22 – Álvaro Alsogaray, Argentine politician and businessman (d. 2005)
- June 23
- June 24
- June 25 – Cyril Fletcher, British comedian (d. 2005)
- June 26
- June 27
- June 28
- June 30
- July 1
- Lee Guttero, American basketball player (d. 2004)
- Noel Miller, Australian cricketer (d. 2007)
- Frederick Malkus, American politician (d. 1999)
- André Tollet, French upholsterer, trade unionist and communist (d. 2001)
- Frank Barrett, relief pitcher (d. 1998)
- Mario Acerbi, Italian football player (d. 2010)
- Paramasiva Prabhakar Kumaramangalam, Indian Army Chief (d. 2000)
- July 3 – Dorothy Kilgallen, American newspaper columnist (d. 1965)
- July 4 – Barbara Weeks, American actress (d. 2003)
- July 5
- July 6 – Vance Trimble, American Pulitzer Prize-winning journalist and author
- July 7
- July 8
- July 9 – William M. Zachacki, (d. 1969)
- July 10
- July 12
- July 13
- July 14
- July 15
- July 16
- July 17
- July 18
- July 19
- July 20
- July 22
- July 23 – Michael Foot, British politician (d. 2010)
- July 24 – Robert Emhardt, American actor (d. 1994)
- July 28 – Hedley Kett, British naval officer (d. 2014)
- July 29 – Erich Priebke, German war criminal and leader of the 1944 Ardeatine massacre (d. 2013)
- July 30 – Lou Darvas, American artist and cartoonist (d. 1987)
- August 8
- August 9 – Tadeusz Kotz, Polish World War II fighter ace (d. 2008)
- August 10
- August 13
- August 16
- August 17
- August 18 – Nils Löfgren, Swedish chemist (d. 1967)
- August 19 – Richard Simmons, American actor (d. 2003)
- August 20 – Roger Wolcott Sperry, American neurobiologist, recipient of the Nobel Prize in Physiology or Medicine (d. 1994)
- August 25 – Don DeFore, American actor (d. 1993)
- August 26 – Boris Pahor, Slovenian writer
- August 27 – Nina Schenk Gräfin von Stauffenberg, German wife of freedom fighter Claus Schenk von Stauffenberg (d. 2006)
- August 28
- August 29 – Jan Ekier, Polish pianist and composer (d. 2014)
- August 30 – Richard Stone, British economist, Nobel Prize laureate (d. 1991)
- August 31
- September 1 – Ludwig Merwart, Austrian painter and graphic artist (d. 1979)
- September 2
- September 3 – Alan Ladd, American actor (b. 1964)
- September 4
- September 10 – Lincoln Gordon, American diplomat (d. 2009)
- September 11
- September 12
- September 13
- September 14
- September 15 – John N. Mitchell, United States Attorney General and convicted Watergate criminal (d. 1988)
- September 17
- September 19 – Frances Farmer, American actress (d. 1970)
- September 22 – Lillian Chestney, American painter (d. 2000)
- September 23 – Carl-Henning Pedersen, Danish artist, member of the CoBrA movement (d. 2007)
- September 24
- September 25
- September 28 – Warja Honegger-Lavater, Swiss artist and illustrator (d. 2007)
- September 29
- September 30 – Bill Walsh, American movie producer and writer (d. 1975)
- October 2 – Roma Mitchell, Australia lawyer and Governor of South Australia (d. 2000)
- October 4 – Martial Célestin, 1st Prime Minister of Haiti (d. 2011)
- October 10
- October 11 – Joe Simon, American comic book artist and writer (d. 2011)
- October 18 – Evelyn Venable, American actress (d. 1993)
- October 19 – Vinicius de Moraes, Brazilian poet, lyricist, and diplomat (d. 1980)
- October 20 – Barney Phillips, American actor (d. 1982)
- October 22
- October 24 – Tito Gobbi, Italian operatic baritone (d. 1984)
- October 27
- October 28 – Don Lusk, American animator
- November 2 – Burt Lancaster, American actor, better known for his role in Elmer Gantry (d. 1994)
- November 3
- November 5 – Vivien Leigh, British actress, better known for her role in Gone With The Wind (d. 1967)
- November 7
- November 10 – Álvaro Cunhal, Portuguese politician (d. 2005)
- November 13
- November 15 – Arthur Haulot, Belgian journalist (d. 2005)
- November 16 – Ellen Albertini Dow, American actress (d. 2015)
- November 18 – Endre Rozsda, Hungarian-French painter (d. 1999)
- November 21
- November 22
- November 25 – Lewis Thomas, American physician and essayist (d. 1993)
- December 1 – Mary Martin, American actress (d. 1990)
- December 2 – Jerry Sohl, American scriptwriter (d. 2002)
- December 6
- December 8 – Delmore Schwartz, American poet (d. 1966)
- December 10
- December 13 – Arnold Brown, Salvation Army general (d. 2002)
- December 15 – Muriel Rukeyser, American poet (d. 1980)
- December 16 – George Ignatieff, Canadian diplomat, recipient of the 1984 Pearson Medal of Peace (d. 1989)
- December 18
- December 21 – Arnold Friberg, American artist (d. 2010)
- December 25
- December 26 – Frank Swift, English footballer (d. 1958)
- December 28
- December 29 – Pierre Werner, Prime Minister of Luxembourg (d. 2002)
- December 30 – Elyne Mitchell, Australian author (d. 2002)
- Halil-Salim Jabara, Israeli Arab politician (d. 1999)
- Bahjat Talhouni, 4-Time Prime Minister of Jordan (d. 1994)
- January 2 – Léon Teisserenc de Bort, French meteorologist (b. 1855)
- January 4 – Alfred von Schlieffen, German field marshal (b. 1833)
- January 16 – Thaddeus S. C. Lowe, American aeronaut, scientist and inventor (b. 1832)
- January 20 – José Guadalupe Posada, Mexican political printmaker and engraver (b. 1852)
- January 27 – Archduke Rainer Ferdinand of Austria, statesman, former Prime Minister (b. 1832)
- January 28 – Segismundo Moret, 3-time Prime Minister of Spain (b. 1833)
- February 2 – Gustaf de Laval, Swedish engineer and inventor (b. 1845)
- February 5 – Yohan Kazimir Ernrot, 5th Prime Minister of Bulgaria (b. 1833)
- February 9 – Manuel Enrique Araujo, President of El Salvador (assassinated) (b. 1865)
- February 17 – Edward Stanley Gibbons, English philatelist and founder of Stanley Gibbons Ltd (b. 1840)
- February 22
- February 26 – Felix Draeseke, German composer (b. 1835)
- March 10 – Harriet Tubman, African-American abolitionist, humanitarian and spy (b. c. 1822)
- March 11 – John Shaw Billings, American military and medical leader (b. 1838)
- March 18 – King George I of Greece (b. 1845)
- March 22
- March 25 – Garnet Wolseley, 1st Viscount Wolseley, British field marshal (b. 1833)
- March 31 – J. P. Morgan, American financier and banker (b. 1837)
- April 19 – Hugo Winckler, German archaeologist and historian who uncovered the capital of the Hittite Empire (Hattusa) (b. 1863)
- April 27 – Gabriel von Seidl, German architect) (b. 1848)
- May 1 – John Barclay Armstrong, Texas Ranger and U.S. Marshal (b. 1850)
- May 6 – Elena Guro, Russian painter and writer (b. 1877)
- May 16 – Louis Perrier, member of the Swiss Federal Council (b. 1849)
- May 25 – Alfred Redl, Austrian military intelligence officer and double agent (b. 1864 ; honorable suicide)
- June 2 – Alfred Austin, English Poet Laureate (b. 1835)
- June 5 – Chris von der Ahe, German-born American brewer and baseball owner (b. 1851)
- June 8 – Emily Davison, English suffragette (b. 1872)
- June 23 – Nicolás de Piérola, Peruvian politician and 2-time President of Peru (b. 1839)
- June 28 – Manuel Ferraz de Campos Sales, Brazilian lawyer and politician and 4th President of Brazil (b. 1841)
- July 1 – Emanuel M. Abrahams, American politician and businessman (b. 1866)
- July 3 – Horatio Nelson Young, American Civil War naval hero (b. 1845)
- July 13 – Edward Burd Grubb, Jr., American Civil War Union Brevet Brigadier General (b. 1841)
- July 19 – Clímaco Calderón, Colombian lawyer and politician, 15th President of Colombia (b. 1852)
- July 20 – Vsevolod Rudnev, Russian admiral (b. 1855)
- July 29 – Tobias Asser, Dutch jurist, recipient of the Nobel Peace Prize (b. 1838)
- August 3 – Josephine Cochrane, inventor of the first commercially successful dishwasher (b. 1839)
- August 7 – Samuel Franklin Cody, American/British aviation pioneer (b. 1867)
- August 13 – August Bebel, German politician (b. 1840)
- August 22 – Oscar de Négrier, French general (b. 1839)
- September 9 – Paul de Smet de Naeyer, 16th Prime Minister of Belgium (b. 1843)
- September 29 – Rudolf Diesel, German engine inventor (b. 1858)
- October 4 – Faisal bin Turki, Sultan of Oman (b. 1864)
- October 5 – Hans von Bartels, German painter (b. 1856)
- October 10 – Katsura Tarō, 6th Prime Minister of Japan (b. 1848)
- October 13 – Leonid Sobolev, 6th Prime Minister of Bulgaria (b. 1844)
- October 16 – Ralph Rose, American athlete (b. 1885)
- October 19 – Charles Tellier, French engineer, inventor of the chemical refrigerator (b. 1828)
- October 29 – Darío de Regoyos, Spanish painter (b. 1857)
- November 7 – Alfred Russel Wallace, Welsh biologist (b. 1823)
- November 22
- December 1 – Juhan Liiv, Estonian poet and short story writer (b. 1864)
- December 7
- December 11 – Carl von In der Maur, Governor of Liechtenstein (b. 1852)
- December 12 – Menelik II, Emperor of Ethiopia (b. 1844)
- December 26 (disappeared on this date) – Ambrose Bierce, American writer and journalist (b. 1842)